82579949 has 4 divisors (see below), whose sum is σ = 82705920. Its totient is φ = 82453980.

The previous prime is 82579943. The next prime is 82579951. The reversal of 82579949 is 94997528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82579949 - 2¹² = 82575853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82579949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82579943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61997 + ... + 63314.

It is an arithmetic number, because the mean of its divisors is an integer number (20676480).

Almost surely, 2^82579949 is an apocalyptic number.

It is an amenable number.

82579949 is a deficient number, since it is larger than the sum of its proper divisors (125971).

82579949 is a wasteful number, since it uses less digits than its factorization.

82579949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125970.

The product of its digits is 1632960, while the sum is 53.

The square root of 82579949 is about 9087.3510441712. The cubic root of 82579949 is about 435.4699619824.

The spelling of 82579949 in words is "eighty-two million, five hundred seventy-nine thousand, nine hundred forty-nine".